Wait for It...

September 26, 2014 6:28 PM

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When he took charge of the U.S. space program in 2005, former NASA administrator Michael Griffin's stated priority was to get us beyond Earth orbit, but he's built his post-NASA career around delivering scathing assessments of its lack of progress.

"My biggest disappointment has been that we have not put people on Mars," says planetary scientist Carol Stoker of NASA Ames.